Union Pacific Railroad piggyback train symbol OANPZ at Chilcoot, CA

Train OANPZ has engines 9309, 9006, and SP8288 pulling 49 loads through Chilcoot on July 11, 1989.
This train began in the 60s as Western Pacific and UP train CIX (California, Illinois Express) and CNW train 244. These trains became the AWPX (Advanced Western Pacific Manifest) in the 70s. CNW train 244 became piggyback train symbol OAWST (Oakland Wood Street Mail) in 1981. Disk 27